<template>
  <div class="cartcontrol">
    <transition  name="move">
      <div class="cart-decrease" v-show="food.count>0" @click.stop.prevent="decreaseCart">
        <span class="inner icon-remove_circle_outline"></span>
      </div>
    </transition>
    <div class="cart-count" v-show="food.count >0">{{food.count}}</div>
    <div class="cart-add icon-add_circle" @click.stop.prevent="addCart"></div>
  </div>
</template>
<script>
// import Vue from 'Vue'
export default {
  props: {
    food: {
      type: Object
    }
  },
  methods: {
    // 重新添加对象属性，用Vue.set不生效，用this.$set才生效
    addCart (event) {
      if (!event._constructed) {
        return
      }
      // console.log('click')
      if (!this.food.count) {
        // 赋值一个本来就没有的属性，需要用vue.set才能实时检测到
        this.$set(this.food, 'count', 1)
        // console.log(this.food.count)
      } else {
        this.food.count++
      }
      this.$emit('add', event.target)
    },
    decreaseCart (event) {
      if (!event._constructed) {
        return
      }
      if (this.food.count) {
        this.food.count--
        // console.log(this.food.count)
      }
    }
  }
}
</script>
<style lang="stylus">
    .cartcontrol
      font-size 0
      .cart-decrease
        display inline-block
        padding 6px
        transition all 0.4s linear
        .inner
          display inline-block
          font-size 24px
          line-height 24px
          color rgb(0,160,220)
          transition all 0.4s linear
        &.move-leave, &.move-enter-active
          opacity 1
          transform translate3d(0,0,0)
          .inner
            transform rotate(0)
        &.move-enter, &.move-leave-active
          opacity 0
          transform translate3d(24px,0,0)
          .inner
            transform rotate(180deg)
      .cart-count
        display inline-block
        padding-top 6px
        font-size 10px
        vertical-align top
        width 12px
        line-height 24px
        text-align center
        color rgb(147, 153, 159)
      .cart-add
        display inline-block
        padding 6px
        font-size 24px
        line-height 24px
        color rgb(0,160,220)
</style>
